Not sure if this has previously been covered so apologies if it has.
Previously with Flex; the wavy colour flowing through the card would reflect the colour of your main card, e.g. if you had Plus the colour would be holographic blue.
It seems that this has reverted back to hot coral, which it in itself is no issue but it was a nice little feature to have it reflect your main Monzo account.
Would be great if under labs you could toggle between hot coral and holographic blue
Might be important to mention that it changed back to hot coral when I ordered my physical flex card?